doc/instances_console: Tweak wording on SPICE clients

Closes #928

Signed-off-by: Stéphane Graber <[email protected]>

doc/howto/instances_console.md

@@ -25,7 +25,12 @@ Using the console you can, for example, install an operating system using a grap
 An additional advantage is that the console is available even if the `incus-agent` process is not running.
 This means that you can access the VM through the console before the `incus-agent` starts up, and also if the `incus-agent` is not available at all.
 
-To start the VGA console with graphical output for your VM, you must install a SPICE client (for example, `virt-viewer` or `spice-gtk-client`).
+To start the VGA console with graphical output for your VM, you must install a SPICE client.
+Incus supports two common clients:
+
+- `remote-viewer` (often part of the `virt-viewer` package)
+- `spicy` (part of the `spice-client-gtk` or `spice-gtk-tools` package)
+
 Then enter the following command:
 
     incus console <vm_name> --type vga